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ccase39 06-12-2013 10:07 PM

Another 556 or 223 thread
My new mini has 223 inscribed on it but the instruction manual I have for its serial number says its chambered for either. So which is it?

Dearhunter 06-12-2013 10:50 PM

Normally, a barrel that has 5.56 can shoot either 5.56 or 223. I suggest contacting the manufacture of the barrel assy.

JonM 06-12-2013 10:59 PM

go with what is inscribed on the barrel. the manuals are written for many models and may not apply specifically in all respects to your gun. a decent gunsmith can ream a 223 out to 556. personally i would have it reamed to wylde chamber spec if i was going to do it. contacting ruger tech support with your serial number will tell you also. that is if it was never rebarreled...

tri70 06-13-2013 01:17 AM

Your mini 14 can shoot 223 or 5.56, the target model is the only model with a true 223 Rem chamber.

bwraven 06-13-2013 02:25 AM

Listen to tri70. He knows what he's talking about!

As long as it's not a "target model", the chamber will accept .223 or 5.56.

hawkguy 06-13-2013 01:26 PM


Originally Posted by tri70 (Post 1274866)
Your mini 14 can shoot 223 or 5.56, the target model is the only model with a true 223 Rem chamber.

correct! says so in the owner's manual! both run fine through my mini!

Sniper03 06-13-2013 10:30 PM


Is exactly correct. Standard Mini = 5.56 NATO Chamber. Target Model = 223 Remington Chamber. The 5.56 chamber has a longer lead than the 223 Remington chamber. So if you would shoot a 5.56 in a 223 Remington Chamber the Chamber Pressure well exceeds what it should. Not to mention military mil-spec ammo is hotter than commercial ammunition which adds to the problem.


ccase39 06-14-2013 02:06 AM

Thanks guys! Kinda what I thought but I wanted to be sure. Didn't want to have to start buying both 556 for my AR and 223 for my mini. Now I can just get whats cheapest and run it through both.

therewolf 08-27-2013 02:16 AM

It's a little deceptive, because while the

barrel isn't labeled "5.56", many Mini-14

variants, like the Ranch Model, are specifically

listed to shoot both.

therewolf 09-27-2014 12:10 PM

This would be why, when I got my

AR, I made sure it was labeled 5.56.

With today's ammo woes, the last thing you

want is limitations.

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